Slantsy


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Slantsy

 

a city under oblast jurisdiction; administrative center of Slantsy Raion, Leningrad Oblast, RSFSR. Located on the Pliussa River, which empties into the Narva Reservoir. Railroad station on the Leningrad-Gdov line. Population, 42,700 (1975). Shale is mined and processed at Slantsy. The city has a cement plant, a brickyard, a regenerator plant, a combine for the production of construction components, a lumber combine, and other enterprises. It also has an industrial technicum. The general technical department of the Leningrad Institute of Mines is located in Slantsy.


Slantsy

 

a Russian term meaning rocks characterized by an almost parallel arrangement of elongated or platy materials and capable of splitting into thin sheets. The term covers the variety of laminated to foliated rocks encompassed by the three terms “shale,” “slate,” and “schist” in English. According to the degree of regional metamorphism, a distinction is made between two large groups of slantsy: (1) shales (including slates), which are weakly metamorphosed rocks; and (2) schists, which are extensively metamorphosed rocks.

Shales consist primarily of clay minerals, hydromicas, or, less frequently, montmorillonite. In the group of schists, various kinds of mica schists are distinguished—biotite, muscovite, and, less frequently, paragonite schists—according to the mineral composition; the minerals include micas, amphiboles, feldspars, and quartz. As the content of feldspars and quartz increases, the mica schists grade into gneisses, and the amphibo-lite schists grade into amphibolites. Schists sometimes bear the name of a relatively rare mineral that is included in their composition; examples are garnet, staurolite, and cyanite schists.

An intermediate position between the shales (and slates) and the schists is occupied by phyllites, chlorite schists, and green-schists. Such rocks have been subjected to metamorphism under the conditions of the greenschist facies at relatively shallow depths. In the composition of these rocks there are found micas and many green-colored minerals, such as chlorite, epidote, and various amphiboles. Greenschists are formed from sedimentary and igneous rocks.

Shales that have complete foliation are used as roofing slate. Roofing slate is extracted by quarrying and underground mining. The blocks of slate are cut and split into sheets about 0.5–1 cm thick, which are used for the roofing and facing of buildings.

Shales lacking complete foliation and the waste material from the production of roofing slates are used to make inflated shales. In the USSR, schungites, which are shales mined near the village of Shun’ga in Karelia, are used for these purposes. In inflated form, this material is known as schungisite and is used as a high-quality filler for concrete.

Schists, especially those similar to gneisses, are used as a construction material and as a source of refractory materials.

Shales rich in organic matter are used as combustible shales.

REFERENCE

Kurs mestorozhdenii nemetallicheskikh poleznykh iskopaemykh. Moscow, 1969.

V. P. PETROV [23–1650–]

References in periodicals archive ?
In the village of Vyskatka, the Slantsy district is opened after reconstruction of the yard of the livestock farm of Rodina JSC.
Russian real estate development and building materials company OJSC LSR Group (LSE: LSRG) (MOEX: LSRG) LSR Group has completed the sale of its cement plant located in Slantsy, the Leningrad region, to Eurocement Group, the company said.
23 January 2015 - Russian real estate development and building materials company OJSC LSR Group (LSE: LSRG) (MOEX: LSRG) LSR Group has completed the sale of its cement plant located in Slantsy, the Leningrad region, to Eurocement Group, the company said.
Next to Estonia, in Russia, the Slantsy cement plant, which was recently modernized, is designed to use spent shale from retorting and kerogenous waste from oil shale mining to produce clinker.
The Slantsy cement plant reached full capacity in 2Q and LSR launched a brick plant in Moscow Region in July.
China's state development bank has also agreed to lend VEB310m, which will be used to finance construction of a cement factory in the Russian town of Slantsy in the Leningrad region, the Russian bank said.
The new plant will be located in Slantsy, some 200 kilometres west of St Petersburg.
For example, in the course of monitoring in 2002 a pollution source from the Russian side was detected in the Plyussa River downstream from Slantsy within the frames of a Swedish-Russian-Estonian joint expedition.
A number of metamorphic domes have been determined, showing granulite facies assemblages, such as Haapsalu in western Estonia; Tapa, Uljaste, and Johvi in NE Estonia, and Slantsy in NW Russia (see Puura et al.
A special prize in the nomination "Journey through the villages of Russia" was awarded the information site of the village of Zasosye, Slantsy district.
In 2Q 2012 cement plant in Slantsy reached full capacity and by July LSR put into operation its brick plant in Moscow region.
The first full-scale experiments on vortex combustion technology using oil shale as fuel were conducted in the early 70s on the medium-pressure boiler BKZ-75-39F at the Ahtme Thermal Power Plant (Estonia) and Slantsy Power Plant (Russia).